An adheisive nail for use with nano tape (1,5-1,7mm thick, 30x30mm piece) for hanging things like picture frames.
This is similar to products such as e.g. Tesa's adhesive nails, but without the fancy easy-to-remove functionality.
I will recommend printing the model in PETG and using PLA as interface material with 0 mm top z distance for the flattest possible surface for the nano tape.
The adhesion may depend on the surface you hang the nail on, as will the max load.
Be careful with fragile surfaces such as wallpaper.